Our ink holds ink insite all our Classic pens. This gives you the "double wall protection" most pen users prefer. You can also fill additional ink reservoirs and cap them to carry extra ink or paint into the field. This makes extra reservoirs the ideal accessory for our Classic pens. The reservoir slides easily into place. Cap is included.
Note: You don't need the ink reservoir if you have a higher risk level. You can fill the pen body for our Classic pens with ink, screw the pen shut, and carry your ink that way. The tight threads seal against leakage, and that doubles your carrying capacity so you don't have to worry about refilling your pen. It's your choice - security or capacity.